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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">receive_data</span><span data-if="c" style="display:none;">T_receive_data</span><span data-if="cpp" style="display:none;">ReceiveData</span><span data-if="dotnet" style="display:none;">ReceiveData</span><span data-if="python" style="display:none;">receive_data</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">receive_data</span><span data-if="c" style="display:none;">T_receive_data</span><span data-if="cpp" style="display:none;">ReceiveData</span><span data-if="dotnet" style="display:none;">ReceiveData</span><span data-if="python" style="display:none;">receive_data</span></code> — Receive arbitrary data from external devices or applications using a
generic socket connection.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>receive_data</b>( :  : <a href="#Socket"><i>Socket</i></a>, <a href="#Format"><i>Format</i></a> : <a href="#Data"><i>Data</i></a>, <a href="#From"><i>From</i></a>)</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>T_receive_data</b>(const Htuple <a href="#Socket"><i>Socket</i></a>, const Htuple <a href="#Format"><i>Format</i></a>, Htuple* <a href="#Data"><i>Data</i></a>, Htuple* <a href="#From"><i>From</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>ReceiveData</b>(const HTuple&amp; <a href="#Socket"><i>Socket</i></a>, const HTuple&amp; <a href="#Format"><i>Format</i></a>, HTuple* <a href="#Data"><i>Data</i></a>, HTuple* <a href="#From"><i>From</i></a>)</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HSocket.html">HSocket</a>::<b>ReceiveData</b>(const HTuple&amp; <a href="#Format"><i>Format</i></a>, HTuple* <a href="#From"><i>From</i></a>) const</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HSocket.html">HSocket</a>::<b>ReceiveData</b>(const HString&amp; <a href="#Format"><i>Format</i></a>, HString* <a href="#From"><i>From</i></a>) const</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HSocket.html">HSocket</a>::<b>ReceiveData</b>(const char* <a href="#Format"><i>Format</i></a>, HString* <a href="#From"><i>From</i></a>) const</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HSocket.html">HSocket</a>::<b>ReceiveData</b>(const wchar_t* <a href="#Format"><i>Format</i></a>, HString* <a href="#From"><i>From</i></a>) const  <span class="signnote">
            (
            Windows only)
          </span></code></p>
</div>
<div data-if="com" style="display:none;"></div>
<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>ReceiveData</b>(<a href="HTuple.html">HTuple</a> <a href="#Socket"><i>socket</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Format"><i>format</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Data"><i>data</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#From"><i>from</i></a>)</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HSocket.html">HSocket</a>.<b>ReceiveData</b>(<a href="HTuple.html">HTuple</a> <a href="#Format"><i>format</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#From"><i>from</i></a>)</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HSocket.html">HSocket</a>.<b>ReceiveData</b>(string <a href="#Format"><i>format</i></a>, out string <a href="#From"><i>from</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>receive_data</b>(<a href="#Socket"><i>socket</i></a>: HHandle, <a href="#Format"><i>format</i></a>: MaybeSequence[str]) -&gt; Tuple[HTupleElementType, Union[int, str]]</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">receive_data</span><span data-if="c" style="display:none">receive_data</span><span data-if="cpp" style="display:none">ReceiveData</span><span data-if="com" style="display:none">ReceiveData</span><span data-if="dotnet" style="display:none">ReceiveData</span><span data-if="python" style="display:none">receive_data</span></code> receives arbitrary data over a generic socket
connection. The received data is converted from a binary network
packet to a value (or a tuple of values) using the parameter <a href="#Format"><i><code><span data-if="hdevelop" style="display:inline">Format</span><span data-if="c" style="display:none">Format</span><span data-if="cpp" style="display:none">Format</span><span data-if="com" style="display:none">Format</span><span data-if="dotnet" style="display:none">format</span><span data-if="python" style="display:none">format</span></code></i></a>
as specification and is well-suited to communicate with external devices or
applications.  This operator does not support the standard <i><span data-if="hdevelop" style="display:inline">'HALCON'</span><span data-if="c" style="display:none">"HALCON"</span><span data-if="cpp" style="display:none">"HALCON"</span><span data-if="com" style="display:none">"HALCON"</span><span data-if="dotnet" style="display:none">"HALCON"</span><span data-if="python" style="display:none">"HALCON"</span></i>
protocol, but is intended for arbitrary data transfer.
</p>
<p>The received data is converted to a value or tuple of values using the
parameter <a href="#Format"><i><code><span data-if="hdevelop" style="display:inline">Format</span><span data-if="c" style="display:none">Format</span><span data-if="cpp" style="display:none">Format</span><span data-if="com" style="display:none">Format</span><span data-if="dotnet" style="display:none">format</span><span data-if="python" style="display:none">format</span></code></i></a>. It is possible to specify multiple formats. In
this case the <a href="#From"><i><code><span data-if="hdevelop" style="display:inline">From</span><span data-if="c" style="display:none">From</span><span data-if="cpp" style="display:none">From</span><span data-if="com" style="display:none">From</span><span data-if="dotnet" style="display:none">from</span><span data-if="python" style="display:none">from</span></code></i></a> parameter will contain a 3rd value which tells
you which format has been used to convert the data. To decide which format to
use the size of the necessary data for each format is calculated initially.
When data is received, the first format string with the matching size is used
to convert the data to values.
</p>
<p>The parameter <a href="#From"><i><code><span data-if="hdevelop" style="display:inline">From</span><span data-if="c" style="display:none">From</span><span data-if="cpp" style="display:none">From</span><span data-if="com" style="display:none">From</span><span data-if="dotnet" style="display:none">from</span><span data-if="python" style="display:none">from</span></code></i></a> contains the IP address or hostname and port of
the communication partner. For UDP connections it can be used in the
<a href="send_data.html"><code><span data-if="hdevelop" style="display:inline">send_data</span><span data-if="c" style="display:none">send_data</span><span data-if="cpp" style="display:none">SendData</span><span data-if="com" style="display:none">SendData</span><span data-if="dotnet" style="display:none">SendData</span><span data-if="python" style="display:none">send_data</span></code></a> operator to send a response.
</p>
<p>Please see <a href="send_data.html"><code><span data-if="hdevelop" style="display:inline">send_data</span><span data-if="c" style="display:none">send_data</span><span data-if="cpp" style="display:none">SendData</span><span data-if="com" style="display:none">SendData</span><span data-if="dotnet" style="display:none">SendData</span><span data-if="python" style="display:none">send_data</span></code></a> for a detailed description of the format.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="Socket" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Socket</span><span data-if="c" style="display:none">Socket</span><span data-if="cpp" style="display:none">Socket</span><span data-if="com" style="display:none">Socket</span><span data-if="dotnet" style="display:none">socket</span><span data-if="python" style="display:none">socket</span></code></b> (input_control)  </span><span>socket <code>→</code> <span data-if="dotnet" style="display:none"><a href="HSocket.html">HSocket</a>, </span><span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">HHandle</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (handle)</span><span data-if="dotnet" style="display:none"> (<i>IntPtr</i>)</span><span data-if="cpp" style="display:none"> (<i>HHandle</i>)</span><span data-if="c" style="display:none"> (<i>handle</i>)</span></span>
</div>
<p class="pardesc">套接字号码。</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Format" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Format</span><span data-if="c" style="display:none">Format</span><span data-if="cpp" style="display:none">Format</span><span data-if="com" style="display:none">Format</span><span data-if="dotnet" style="display:none">format</span><span data-if="python" style="display:none">format</span></code></b> (input_control)  </span><span>string(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[str]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Specification how to convert the data to tuples.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'z'</span>
    <span data-if="c" style="display:none">"z"</span>
    <span data-if="cpp" style="display:none">"z"</span>
    <span data-if="com" style="display:none">"z"</span>
    <span data-if="dotnet" style="display:none">"z"</span>
    <span data-if="python" style="display:none">"z"</span>
</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Data" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Data</span><span data-if="c" style="display:none">Data</span><span data-if="cpp" style="display:none">Data</span><span data-if="com" style="display:none">Data</span><span data-if="dotnet" style="display:none">data</span><span data-if="python" style="display:none">data</span></code></b> (output_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">HTupleElementType</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string / </span><span data-if="hdevelop" style="display:inline">real / </span><span data-if="hdevelop" style="display:inline">integer / </span><span data-if="hdevelop" style="display:inline">handle)</span><span data-if="dotnet" style="display:none"> (<i>string</i> / </span><span data-if="dotnet" style="display:none">double / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long / </span><span data-if="dotnet" style="display:none">HHandle)</span><span data-if="cpp" style="display:none"> (<i>HString</i> / </span><span data-if="cpp" style="display:none">double / </span><span data-if="cpp" style="display:none">Hlong / </span><span data-if="cpp" style="display:none">HHandle)</span><span data-if="c" style="display:none"> (<i>char*</i> / </span><span data-if="c" style="display:none">double / </span><span data-if="c" style="display:none">Hlong / </span><span data-if="c" style="display:none">handle)</span></span>
</div>
<p class="pardesc">Value (or tuple of values) holding the received and converted
data.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="From" class="parname"><b><code><span data-if="hdevelop" style="display:inline">From</span><span data-if="c" style="display:none">From</span><span data-if="cpp" style="display:none">From</span><span data-if="com" style="display:none">From</span><span data-if="dotnet" style="display:none">from</span><span data-if="python" style="display:none">from</span></code></b> (output_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Union[int, str]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string / </span><span data-if="hdevelop" style="display:inline">integer)</span><span data-if="dotnet" style="display:none"> (<i>string</i> / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>HString</i> / </span><span data-if="cpp" style="display:none">Hlong)</span><span data-if="c" style="display:none"> (<i>char*</i> / </span><span data-if="c" style="display:none">Hlong)</span></span>
</div>
<p class="pardesc">IP address or hostname and network port of the communication
partner.</p>
</div>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="open_socket_connect.html"><span data-if="hdevelop" style="display:inline">open_socket_connect</span><span data-if="c" style="display:none">open_socket_connect</span><span data-if="cpp" style="display:none">OpenSocketConnect</span><span data-if="com" style="display:none">OpenSocketConnect</span><span data-if="dotnet" style="display:none">OpenSocketConnect</span><span data-if="python" style="display:none">open_socket_connect</span></a></code>, 
<code><a href="socket_accept_connect.html"><span data-if="hdevelop" style="display:inline">socket_accept_connect</span><span data-if="c" style="display:none">socket_accept_connect</span><span data-if="cpp" style="display:none">SocketAcceptConnect</span><span data-if="com" style="display:none">SocketAcceptConnect</span><span data-if="dotnet" style="display:none">SocketAcceptConnect</span><span data-if="python" style="display:none">socket_accept_connect</span></a></code>, 
<code><a href="get_socket_param.html"><span data-if="hdevelop" style="display:inline">get_socket_param</span><span data-if="c" style="display:none">get_socket_param</span><span data-if="cpp" style="display:none">GetSocketParam</span><span data-if="com" style="display:none">GetSocketParam</span><span data-if="dotnet" style="display:none">GetSocketParam</span><span data-if="python" style="display:none">get_socket_param</span></a></code>, 
<code><a href="set_socket_param.html"><span data-if="hdevelop" style="display:inline">set_socket_param</span><span data-if="c" style="display:none">set_socket_param</span><span data-if="cpp" style="display:none">SetSocketParam</span><span data-if="com" style="display:none">SetSocketParam</span><span data-if="dotnet" style="display:none">SetSocketParam</span><span data-if="python" style="display:none">set_socket_param</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="close_socket.html"><span data-if="hdevelop" style="display:inline">close_socket</span><span data-if="c" style="display:none">close_socket</span><span data-if="cpp" style="display:none">CloseSocket</span><span data-if="com" style="display:none">CloseSocket</span><span data-if="dotnet" style="display:none">CloseSocket</span><span data-if="python" style="display:none">close_socket</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="send_data.html"><span data-if="hdevelop" style="display:inline">send_data</span><span data-if="c" style="display:none">send_data</span><span data-if="cpp" style="display:none">SendData</span><span data-if="com" style="display:none">SendData</span><span data-if="dotnet" style="display:none">SendData</span><span data-if="python" style="display:none">send_data</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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